Projective texture mapping: Difference between revisions

Revision as of 23:27, 23 April 2022

Revision as of 20:21, 10 November 2022

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== Fixed function pipeline approach ==

Historically{{ref|nvsdk_ptm}}, using projective texture mapping involved considering a special form of eye linear texture coordinate generation{{ref|glEyeLinear}} transform (''tcGen'' for short). This transform was then multiplied by another matrix representing the projector's properties which waswere stored in texture coordinate transform matrix{{ref|glTCXform}}. The resulting concatenated matrix was basically a function of both projector properties and vertex eye positions.

The key points of this approach are that eye linear tcGen is a function of vertex eye coordinates, which is a result of both eye properties and object space vertex coordinates (more specifically, the object space vertex position is transformed by the model-view-projection matrix).